I got this jacket for my son to wear to an his all boys school in Newport. He is 10 years old, about 45 pounds, and 4'3". I was hesitant about purchasing the size 7, but decided to go for it. He loves wearing the comfortable materials and we even bought monogrammed brass buttons that we sewed on to it. I was worried how comfortable he would be in a coat and uniform, but with this jacket, he doesn't want to take his uniform off.